LiNH2BH3-promoted reductive opening of 8-substituted phenylglycinol-derived oxazolopiperidone lactams leads to enantiopure 4-substituted-5-aminopentanols, which are used as starting building blocks in the synthesis of the Haliclona alkaloids haliclorensin C, haliclorensin, and halitulin (formal). The starting lactams are easily accessible by a cyclocondensation reaction of (R)-phenylglycinol with racemic γ-subtituted
LiNH 2 BH 3促进的8取代的苯基甘
氨醇衍生的
恶唑并
哌啶酮内酰胺的还原性打开反应导致对映体纯的4取代的5-
氨基
戊醇,这些化合物被用作Haliclona
生物碱类盐
蒜素C,盐
蒜素和Hallitulin(正式的)。起始内酰胺很容易通过(R)-苯基甘
氨醇与外消旋的γ-取代的δ-氧代酯的环缩合反应获得,该过程涉及动态动力学拆分。